CN106576120B - Internet Protocol address assignment method, router, and computer-readable storage medium - Google Patents

Abstract

The embodiments of the present invention provide an Internet protocol address allocation method and a router. The Internet protocol address allocation method of the present invention includes: receiving a proxy prefix of an upper-level network device; the upper-level network device is a network device connected to a WAN interface of a router; generating a local prefix of the router and a proxy prefix of the router according to the proxy prefix of the upper-level network device; The router's local prefix and the router's proxy prefix are sent to the router's subordinate routers. In the embodiment of the present invention, the IP addresses of each device in the cascaded networking can be obtained.

Description

Internet Protocol address assignment method, router, and computer-readable storage medium

technical field

Embodiments of the present invention relate to communication technologies, and in particular, to an Internet Protocol address allocation method and a router.

Background technique

With the continuous development of Internet technology, Internet protocols are also constantly updated. With the update of the Internet protocol, the networking method is also constantly updated. In the Internet Protocol Version 6 (Internet Protocol Version 6, referred to as IPV6) networking, a broadband access server (Broadband Access Server, referred to as BAS) is mostly used to connect the router, and the router connects to the terminal.

In the existing IPV6 networking, the BAS can configure a server local prefix (Local Prefix) and a server proxy prefix (Delegate Prefix) for the interface service of a router connected to the BAS. The BAS may configure an Internet Protocol (Internet Protocol, IP for short) address for a wide area network (Wide Area Network, referred to as WAN) interface on the router connected to the BAS according to the local prefix of the server. The BAS may carry the server local prefix and send the server proxy prefix to the router. The router can generate the local prefix of the router according to the server proxy prefix, and obtain the IP address of the local area network (LAN) interface of the router according to the local prefix of the router, that is, the IP address of the terminal connected to the router. The router also obtains the IP address of the router's WAN interface based on the server's local prefix.

In enterprise users or large laboratories, there is usually only one ingress router connected to the Internet through the BAS. By connecting the routers at the ingress router to form a cascaded network, the access of multiple terminals in different local area networks can be satisfied. In the prefix acquisition method in the IPV6 networking, the ingress router can only acquire one server proxy prefix from the BAS, that is, the ingress router only has one route-local prefix. Therefore, for cascaded networking, devices connected to cascaded routers cannot obtain IP addresses.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide an Internet protocol address allocation method and router, so as to allocate IP addresses to each device in a cascaded networking.

In a first aspect, an embodiment of the present invention provides an Internet Protocol address allocation method, including:

The router receives the proxy prefix of the upper-level network device sent by the upper-level network device; the upper-level network device is the network device connected to the WAN interface of the router;

The router generates the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device;

The router sends the local prefix of the router and the proxy prefix of the router to the subordinate router of the router; the subordinate router is the router connected to the local area network LAN interface of the router; the local prefix of the router is used for The lower-level router is made to determine the Internet Protocol IP address of the WAN interface of the lower-level router; the proxy prefix of the router is used to make the lower-level router generate the local prefix of the lower-level router.

According to the first aspect, in a first possible implementation manner of the first aspect, the upper-level network device is a broadband access server BAS or a router connected to a WAN interface of the router.

According to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the router generates the local prefix of the router and the router according to the proxy prefix of the upper-level network device proxy prefixes, including:

If the router enables the cascade mode, the router generates the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device.

According to a second possible implementation manner of the first aspect, in a third possible implementation manner, the router generates the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device, including :

The router configures the next bit of the lowest bit of the proxy prefix of the upper-level network device as the first bit value, and supplements the next bit with a random value to obtain the local prefix of the router, Make the number of bits of the local prefix of the router equal to the number of bits of the prefix of the terminal unique identifier EUI;

The router configures the next bit as a second bit value, and adds one to the number of bits of the proxy prefix of the upper-level network device to obtain the proxy prefix of the router; wherein the first bit value different from the second bit value.

According to a third possible implementation manner of the first aspect, in a fourth possible implementation manner, the number of bits of the proxy prefix of the upper-level network device is smaller than the number of bits of the prefix of the EUI.

In a second aspect, an embodiment of the present invention further provides a router, including:

a receiving module, configured to receive the proxy prefix of the upper-level network device sent by the upper-level network device; the upper-level network device is a network device connected to the WAN interface of the router;

a generating module, configured to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device;

A sending module, configured to send the local prefix of the router and the proxy prefix of the router to a subordinate router of the router; the subordinate router is a router connected to the local area network LAN interface of the router; the local prefix of the router The lower-level router is used to make the lower-level router determine the Internet Protocol IP address of the WAN interface of the lower-level router; the proxy prefix of the router is used to enable the lower-level router to generate the local prefix of the lower-level router.

According to the second aspect, in a first possible implementation manner of the second aspect, the upper-level network device is a broadband access server BAS or a router connected to a WAN interface of the router.

According to the second aspect or the first possible implementation manner of the second aspect, in the second possible implementation manner, the generating module is further configured to, if the router enables the cascade mode, according to the upper-level network device The proxy prefix generates the router's local prefix and the router's proxy prefix.

According to a second possible implementation manner of the second aspect, in a third possible implementation manner, the generating module is further configured to configure the next bit of the lowest bit of the proxy prefix of the upper-level network device is the first bit value, and a random value is added after the next bit to obtain the local prefix of the router, so that the number of bits of the local prefix of the router is equal to the number of prefix bits of the terminal unique identifier EUI; The next bit is configured as the second bit value, and one is added to the number of bits of the proxy prefix of the upper-level network device to obtain the proxy prefix of the router; wherein the first bit value is different from the first bit value. Two-bit value.

According to a third possible implementation manner of the second aspect, in a fourth possible implementation manner, the number of bits of the proxy prefix of the upper-level network device is less than the number of bits of the prefix of the terminal unique identifier EUI.

In a third aspect, an embodiment of the present invention further provides a router, including: a receiver, a processor, and a transmitter;

The receiver is configured to receive the proxy prefix of the upper-level network device sent by the upper-level network device; the upper-level network device is a network device connected to the WAN interface of the router;

the processor, configured to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device;

The transmitter is used to send the local prefix of the router and the proxy prefix of the router to the lower-level router of the router; the lower-level router is the router connected to the local area network LAN interface of the router; the router's The local prefix is used to enable the lower-level router to determine the Internet Protocol IP address of the WAN interface of the lower-level router; the proxy prefix of the router is used to enable the lower-level router to generate the local prefix of the lower-level router.

According to a third aspect, in a first possible implementation manner of the third aspect, the upper-level network device is a broadband access server BAS or a router connected to a WAN interface of the router.

According to the third aspect or the first possible implementation manner of the third aspect, in the second possible implementation manner, the processor is further configured to: if the router enables the cascade mode, according to the upper-level network device The proxy prefix generates the router's local prefix and the router's proxy prefix.

According to a second possible implementation manner of the third aspect, in a third possible implementation manner, the processor is further configured to configure the next bit of the lowest bit of the proxy prefix of the upper-level network device is the first bit value, and a random value is added after the next bit to obtain the local prefix of the router, so that the number of bits of the local prefix of the router is equal to the number of prefix bits of the terminal unique identifier EUI; The next bit is configured as a second bit value, and one is added to the number of bits of the proxy prefix of the upper-level network device to obtain the proxy prefix of the router; wherein the first bit value is different from the second bit value.

According to a third possible implementation manner of the third aspect, in a fourth possible implementation manner, the number of bits of the proxy prefix of the upper-level network device is smaller than the number of bits of the prefix of the EUI.

In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, including: at least one program; the at least one program includes computer-readable instructions;

The computer-readable instructions are used to cause the processor of the router to call and execute, to receive the proxy prefix of the upper-level network device sent by the upper-level network device, and to generate a local proxy prefix of the router according to the proxy prefix of the upper-level network device. prefix and the proxy prefix of the router, and send the local prefix of the router and the proxy prefix of the router to the lower-level routers of the router; wherein, the upper-level network device is a network connected to the WAN interface of the router equipment; the lower-level router is a router connected to the local area network LAN interface of the router; the local prefix of the router is used to enable the lower-level router to determine the Internet Protocol IP address of the WAN interface of the lower-level router; the proxy of the router The prefix is used to cause the subordinate router to generate the local prefix of the subordinate router.

According to a fourth aspect, in a first possible implementation manner of the fourth aspect, the upper-level network device is a broadband access server BAS or a router connected to a WAN interface of the router.

According to the fourth aspect or the first possible implementation manner of the fourth aspect, in the second possible implementation manner, the computer-readable instructions are further configured to cause the router to enable the cascade mode when the router starts the cascade mode. The processor of the router invokes and executes to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device.

According to a second possible implementation manner of the fourth aspect, in a third possible implementation manner, the computer-readable instructions are further used to cause the processor of the router to call and execute, so as to The next bit of the lowest bit of the proxy prefix of the network device is configured as the first bit value, and a random value is added after the next bit to obtain the local prefix of the router, so that the local prefix of the router is The number of bits is equal to the number of prefix bits of the terminal unique identifier EUI, the next bit is configured as the second bit value, and one is added to the number of bits of the proxy prefix of the upper-level network device to obtain the router's number of bits. a proxy prefix; wherein the first bit value is different from the second bit value.

According to a third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the number of bits of the proxy prefix of the upper-level network device is smaller than the number of bits of the prefix of the EUI.

The Internet protocol address allocation method, router, and computer-readable storage medium according to the embodiments of the present invention can receive the upper-level network device through the router, that is, the proxy prefix of the upper-level network device sent by the WAN interface of the router connected to the network device, according to the upper-level network device. The proxy prefix of the router generates the local prefix of the router and the proxy prefix of the router, and sends the local prefix of the router and the proxy prefix of the router to the subordinate router of the router, that is, the router to which the router's LAN interface is connected. The local prefix of the router can be used to enable the subordinate router to determine the IP address of the WAN interface of the subordinate router, and the proxy prefix of the router is used to enable the subordinate router to determine the IP address of the terminal connected to the LAN interface of the subordinate router, so as to obtain the cascade connection. IP address of each device in the network.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of an IPv6 cascaded networking to which an embodiment of the present invention is applicable;

2 is a flowchart of a method for allocating an Internet Protocol address according to Embodiment 1 of the present invention;

3 is a flowchart of a method for allocating an Internet Protocol address according to Embodiment 2 of the present invention;

4 is a schematic structural diagram of a cascaded networking according to Embodiment 3 of the present invention;

5 is a flowchart of a method for allocating an Internet Protocol address according to Embodiment 3 of the present invention;

6 is a schematic structural diagram of a router according to Embodiment 4 of the present invention;

7 is a schematic structural diagram of a router according to Embodiment 5 of the present invention;

FIG. 8 is a schematic structural diagram of a computer-readable storage medium according to Embodiment 6 of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The embodiments of the present invention are applicable to IPV6 cascaded networking. The routers in the IPV6 cascading networking can be directly connected to the terminal, or can be connected to the terminal through a relay device, and can also be connected to the terminal through other routers. Among them, the other routers can be called cascade routers. FIG. 1 is a schematic structural diagram of an IPv6 cascaded networking to which an embodiment of the present invention is applicable. As shown in FIG. 1 , in the IPV6 cascaded networking, the first router 102 connected to the BAS 101 may be called an ingress router. The first router 102 is connected to the BAS 101 through a WAN interface (not shown). The first router 102 is connected to the first terminal 103 through a LAN interface, and the first router 102 is also connected to the second router 104 through a LAN interface (not shown). The second router 104 is a cascade router. The first router 102 may be connected to the WAN interface of the second router 104 through a LAN interface, so as to realize the connection between the first router 102 and the second router 104. Wherein, the second router 104 is also connected with the second terminal 105 . It should be noted that, similar to the first router 102, the second router 104 may also be connected to other routers to implement multi-level cascading. If the first router 102 only obtains one server proxy prefix from the BAS 101, and the first router 102 can only generate a routing local prefix according to the one server proxy prefix, the first router 102 does not have the proxy prefix and sends it to the second router 104, which is The second router 104 does not have a local prefix, so the device connected to the second router 104, that is, the second terminal, cannot obtain an IP address.

Example 1

The first embodiment of the present invention provides an Internet protocol address allocation method. The method may be performed by a router. FIG. 2 is a flowchart of a method for allocating an Internet Protocol address according to Embodiment 1 of the present invention. As shown in Figure 2, the method may include:

S201. The router receives the proxy prefix of the upper-level network device sent by the upper-level network device; the upper-level network device is the network device connected to the WAN interface of the router.

Specifically, the router may be any router with lower-level routers in the IPV6 cascaded network. Wherein, the lower-level router may be a router connected through a LAN interface of the router.

The router may be a proxy prefix sent by receiving a proxy prefix identity association (Identity Association for Prefix Delegation, abbreviated IA_PD) message of the upper-level network device through a Dynamic Host Configuration Protocol (Dynamic Host Configuration Protocol, referred to as DHCP) message. Because in the IPV6 cascading networking, most devices, including terminals or routers, support the End-System Unique Identifier (EUI) with a prefix of 64 bits, that is to say, in the IPv6 cascading networking , the prefix used to generate the IP address can be 64 bits. Then, in this embodiment, the length of the proxy prefix of the upper-level network device obtained by the router may be less than 64 bits. The proxy prefix of the upper-level network device can be used to represent each device connected to the LAN interface of the router, such as the domain where the terminal or the router is located.

S202. The router generates a local prefix of the router and a proxy prefix of the router according to the proxy prefix of the upper-level network device.

The router may obtain the proxy prefix of the upper-level network device, and generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device. The bit value of the local prefix of the router is different from the bit value of the proxy prefix of the router. In the IPV6 cascading networking, most devices support 64-bit EUI, so the number of bits of the router's local prefix can be equal to the number of prefixes of the EUI. The number of bits of the router's proxy prefix may be less than or equal to the number of bits of the EUI's prefix. The number of bits of the local prefix of the router may be equal to the number of bits of the prefix of the EUI.

For example, if the number of bits of the proxy prefix of the upper-level network device is 60 bits. The number of prefix bits for this EUI is 64 bits. The router may configure the lower bits of the lowest bits of the proxy prefix of the upper-level network device, that is, the 61st bit to the 64th bit. The router may configure the 60th bit of the proxy prefix of the upper-level network device to a value different from the 60th bit configured in the local prefix of the router, so as to obtain the proxy prefix of the router.

S203, the router sends the local prefix of the router and the proxy prefix of the router to the subordinate router of the router; the subordinate router is a router connected to the LAN interface of the router; the local prefix of the router is used to enable the subordinate router to determine the The IP address of the WAN interface of the lower-level router; the proxy prefix of the router is used to make the lower-level router generate the local prefix of the lower-level router.

Optionally, the router may carry the local prefix of the router in a router advertisement (Router Advertisement (RA) message or a non-temporary address identity association (Identity Association for non-temporary addresses, abbreviated IA_NA) message of a DHCP packet and send it to the router. the subordinate router. The subordinate router may also be referred to as the cascade router of the router. The router may carry the proxy prefix of the router in the IA_PD message of the DHCP message and send it to the subordinate router.

The subordinate router can obtain the local prefix of the router according to the RA message or the IA_NA message of the DHCP message, and according to the local prefix of the router and the status identification of the WAN interface of the subordinate router or the media access control of the WAN interface of the subordinate router (Media Access Control, MAC for short) address generates the IP address of the WAN interface of the lower-level router. In the IPV6 cascaded networking, most of the devices support 64-bit EUI, that is to say, in the IP address of the device, both the prefix and the suffix are 64-bit, so the status identifier of the WAN interface of the subordinate router or this The MAC address of the WAN interface of the subordinate router is converted into an EUI address, that is, a 64-bit suffix, thereby generating the IP address of the WAN interface of the subordinate router according to the 64-bit local prefix of the router and the 64-bit suffix.

The subordinate router may obtain the proxy prefix of the router according to the IA_PD message of the DHCP message, and generate the local prefix of the subordinate router according to the proxy prefix of the router. The local prefix of the subordinate router can be used to make the subordinate router generate the IP address of the terminal connected to the LAN interface of the subordinate router according to the local prefix of the subordinate router and the status of the terminal connected to the LAN interface of the subordinate router. It should be noted that, before the subordinate router generates the IP address of the terminal connected to the LAN interface of the subordinate router, the state identifier of the terminal connected to the LAN interface of the subordinate router needs to be converted into an EUI address, that is, a 64-bit suffix. .

Alternatively, the lower-level router may also send the local prefix of the lower-level router to the terminal connected to the LAN interface of the lower-level router, so that the terminal connected to the LAN interface of the lower-level router is based on the local prefix of the lower-level router and the LAN interface of the lower-level router. The MAC address of the connected terminal generates the IP address of the terminal connected to the LAN interface of the lower-level router. It should be noted that before generating the IP address of the terminal connected to the LAN interface of the subordinate router, the terminal connected to the LAN interface of the subordinate router also needs to convert the MAC address of the terminal connected to the LAN interface of the subordinate router into an EUI address. 64-bit suffix.

The first embodiment of the present invention provides an Internet protocol address allocation method, which can receive the proxy prefix of the upper-level network device sent by the upper-level network device through the router, that is, the WAN interface of the router is connected to the network device, and generate the proxy prefix according to the proxy prefix of the upper-level network device. The router's local prefix and the router's proxy prefix, and send the router's local prefix and the router's proxy prefix to the router's subordinate router, that is, the router connected to the router's LAN interface, because the router's local prefix It can be used to enable the lower-level router to determine the IP address of the WAN interface of the lower-level router, and the proxy prefix of the router is used to enable the lower-level router to determine the IP address of the terminal connected to the LAN interface of the lower-level router. The device is assigned an IP address.

It should be noted that, due to the Internet Protocol address allocation method provided in the first embodiment of the present invention, the IP addresses of routers or terminals in the cascaded networking can be automatically obtained without manual configuration by the administrator, so that the cascaded networking can be achieved. The network maintenance is more convenient and the accuracy is higher.

Embodiment 2

On the basis of the method in the above-mentioned first embodiment, the second embodiment of the present invention further provides an Internet protocol address allocation method. Optionally, the upper-level network device in the first embodiment is a BAS or a router connected to the WAN interface of the router.

Specifically, if the upper-level network device is a BAS connected to the WAN interface of the router, the proxy prefix of the upper-level network device may be a server proxy prefix configured by the BAS according to the interface service of the router. If the upper-level network device is a router connected to the WAN interface of the router, the proxy prefix of the upper-level network device may be generated by the proxy prefix of the other routers received by the router connected to the WAN interface of the router and sent by the other routers.

If the upper-level network device is the BAS connected to the WAN interface of the router, the router can be called an ingress router, and the method of this embodiment can at least realize the IP address of the device connected to the cascaded routers in the first-level cascaded networking. Obtain. If the upper-level router is a router connected to the WAN interface of the router, then the router itself is a cascade router, then the method of this embodiment can also realize the IP address of the device connected to the cascade router in the multi-level cascade network. Obtain.

Optionally, in the above S202, the router generates the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device, which may include:

If the router enables the cascading mode, the router generates the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device.

The cascading mode refers to the connection mode between the lower-level router and the lower-level router that can be established by the lower-level router through the router and the BAS, and then transmits network data corresponding to the router and the lower-level router.

Optionally, the router generates the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device, which may include:

The router configures the next bit of the lowest bit of the proxy prefix of the upper-level network device as the first bit value, and supplements the next bit with a random value to obtain the local prefix of the router, so that the router's local prefix The number of bits of the local prefix is equal to the number of prefix bits of the EUI;

The router configures the next bit as the second bit value, and adds one to the number of bits of the proxy prefix of the upper-level network device to obtain the proxy prefix of the router. Wherein, the first bit value is different from the second bit value.

Specifically, the first bit value may be 0 or 1. If the value of the first bit is 0, the value of the second bit is 1; correspondingly, if the value of the first bit is 1, the value of the second bit may be 0. For example, the router can obtain the local prefix of the router by configuring the next bit of the lowest bit of the proxy prefix of the upper-level network device to be a bit value of 0, and obtain the local prefix of the router through the proxy prefix of the upper-level network device. The next bit of the least significant bit of the proxy prefix is configured as a bit value of 1 to obtain the proxy prefix of the router. The router can also obtain the local prefix of the router by configuring the next bit of the lowest bit of the proxy prefix of the upper-level network device to be a bit value of 1. The next bit of the bit is configured with a bit value of 0 to obtain the proxy prefix for this router.

Optionally, whether the router enables the cascade mode may be pre-configured. If the router enables the cascading mode, the LAN interface of the router is connected to other routers, and the router can send the IA_PD message of the DHCP message to the other routers. That is to say, if the router enables cascading mode, other routers connected to the router's LAN interface, such as the lower-level router, the router can send the router's proxy prefix to the other routers by sending the IA_PD message of the DHCP message. .

If the router does not enable the cascading mode, the router will add a random value to the lowest bit of the proxy prefix of the upper-level network device to obtain the local prefix of the router, and determine the IP of the terminal connected to the router according to the local prefix of the router. address, or, the local prefix of the router is sent to the terminal connected to the router, so that the terminal connected to the router generates the IP address of the terminal connected to the router according to the local prefix of the router.

Optionally, the method further includes:

The router determines the IP address of the terminal connected to the LAN interface of the router according to the local prefix of the router.

Specifically, the router may generate a stateful IP address of the terminal connected to the router according to the local prefix of the router and the state identifier allocated by the router to the terminal connected to the router. The state identifier assigned by the router to the terminal connected to the router may be the number of the terminal connected to the router, and different terminals connected to the router have different numbers, ie, different state identifiers.

Optionally, the method may include:

The router sends the local prefix of the router to the terminal connected to the LAN interface of the router; the local prefix of the router is used to enable the terminal connected to the LAN interface of the router to determine the terminal connected to the LAN interface of the router according to the local prefix of the router. IP address.

The IP address of the terminal connected to the LAN interface of the router can be converted from the MAC address of the terminal connected to the LAN interface of the router into an EUI address, and the stateful router is generated according to the converted EUI address and the local prefix of the router The IP address of the terminal connected to the LAN interface.

The second embodiment of the present invention also provides an Internet protocol address allocation method. FIG. 3 is a flowchart of a method for allocating an Internet Protocol address according to Embodiment 2 of the present invention. As shown in Figure 3, the method further includes:

S301. The router receives the local prefix of the upper-level network device sent by the upper-level network device.

The router may be the local prefix of the upper-level network device sent by the upper-level network device through the RA message or the IA_NA message of the DHCP message.

S302. The router determines the IP address of the WAN interface of the router according to the local prefix of the upper-level network device.

The router determines the IP address of the WAN interface of the router according to the local prefix of the upper-level network device, which is similar to the specific implementation process in which the lower-level router determines the IP address of the WAN interface of the lower-level router according to the local prefix of the router. Repeat.

The method for allocating Internet protocol addresses provided by the second embodiment of the present invention can make the IP addresses of the devices connected to the cascade routers more accurate in the cascaded networking, and ensure the normal transmission of the cascaded networking data.

Embodiment 3

The third embodiment of the present invention also provides an Internet protocol address allocation method. FIG. 4 is a schematic structural diagram of a cascaded networking according to Embodiment 3 of the present invention. As shown in FIG. 4 , in the cascaded networking, the BAS 401 is connected to the WAN interface of the first router 402 . One LAN interface of the first router 402 is connected to the first terminal 403 , and the other LAN interface of the first router 402 is connected to the WAN interface of the second router 404 . One LAN interface of the second router 404 is connected to the second terminal 405 , and the other LAN interface of the second router 404 is connected to the WAN interface of the third router 406 . It should be noted that, the LAN interface of the third router 406 can be connected to other terminals or routers, so as to realize multi-level cascading.

FIG. 5 is a flowchart of a method for allocating an Internet Protocol address according to Embodiment 3 of the present invention. As shown in Figure 5, the method may include:

S501. The BAS determines the local prefix of the BAS and the proxy prefix of the BAS according to the RS message sent by the first router.

The local prefix of the BAS can be represented by the local prefix of the BAS and the length of the local prefix of the BAS. For example, the local prefix of the BAS may be represented as 2014::/64, that is, the length of the local prefix of the BAS is 64 bits.

The bits of the proxy prefix of the BAS may be smaller than the prefix bits of the EUI, such as 64 bits, and the bits of the proxy prefix of the BS may be, for example, 60 bits. The proxy prefix for this BAS can be represented as 2014:1010::/60.

S502. The BAS carries the local prefix of the BAS in the RA message or the IA_NA message of the DHCP and sends it to the first router, and carries the proxy prefix of the BAS in the IA_PD message of the DHCP and sends it to the first router.

S503. The first router generates the IP address of the WAN interface of the first router according to the local prefix of the BAS.

The first router may generate the IP address of the WAN interface of the first router according to the local prefix of the BAS and the state identifier of the first router. If the state identifier of the first router is 1, the IP address of the WAN interface of the first router may be represented as 2014::1.

S504. If the first router enables the cascading mode, the first router configures the next bit of the lowest bit of the proxy prefix of the BAS to a bit value of 0, and configures the next bit of the lowest bit of the proxy prefix of the BAS to a bit value of 0, and the first router is below the lowest bit of the proxy prefix of the BAS. One bit is followed by a random value to obtain the local prefix of the first router, so that the number of bits of the local prefix of the first router is equal to the number of prefix bits of the EUI.

S505. The first router configures the next bit of the lowest bit of the proxy prefix of the BAS as a bit value of 1, and adds one to the number of bits of the proxy prefix of the BAS to obtain the proxy prefix of the first router.

The bits of the proxy prefix of the BAS are 60 bits, and the prefix bits of the EUI are 64 bits, so the first router can be configured in the next bit of the lowest bit of the proxy prefix of the BAS, that is, the 61st bit. If it is 0, the 62nd to 64th bits are configured according to random numbers to obtain the local prefix of the first router. The local prefix of the first router may be represented as 2014:1010::0003/64, for example. The value of the 62nd to 64th bits of the local prefix of the first router, namely 011, is a random number. The number of bits of the local prefix of the first router may be equal to the number of bits of the prefix of the EUI, eg, 64 bits.

The first router may be configured with a bit value of 1 at the 61st bit of the proxy prefix of the BAS, and add one to the number of bits of the proxy prefix of the BAS to obtain the proxy prefix of the first router. The proxy prefix of the first router may be represented as 2014:1010::0008/61, for example.

S506. The first router generates the IP address of the first terminal according to the local prefix of the first router.

The first router generates the IP address of the first terminal according to the local prefix of the first router and the state identifier allocated to the first terminal by the first router. If the status identifier of the first terminal is 2, the IP address of the first terminal may be represented as 2014:1010:0003::2.

S507. The first router carries the local prefix of the first router in the RA message or the IA_NA message of the DHCP and sends it to the second router, and carries the proxy prefix of the first router in the IA_PD message of the DHCP and sends it to the second router Two routers.

S508. The second router generates the IP address of the WAN interface of the second router according to the local prefix of the first router.

The second router may generate the IP address of the WAN interface of the second router according to the local prefix of the first router and the state identifier of the second router. If the status identifier of the second router is 1, the IP address of the WAN interface of the second router may be represented as 2014:1010:0003::1.

S509. If the second router enables the cascading mode, the second router is configured with a bit value of 0 through the next bit of the lowest bit of the proxy prefix of the first router, and the proxy prefix of the first router is configured with a bit value of 0. The next bit of the least significant bit is followed by a random value to obtain the local prefix of the second router, so that the number of bits of the local prefix of the second router is equal to the number of prefix bits of the EUI.

S510. The second router configures the next bit of the lowest bit of the proxy prefix of the first router as a bit value of 1, and adds one to the number of bits of the proxy prefix of the first router to obtain the second router proxy prefix.

The number of bits of the proxy prefix of the first router is 61 bits, then the second router can configure the bit value 0 in the next bit of the lowest bit of the proxy prefix of the first router, that is, the 62nd bit , and configure the 63rd to 64th bits as random numbers to obtain the local prefix of the second router. The local prefix of the second router can be represented as, for example, 2014:1010::0009/64, and the value 01 in the 63rd to 64th bits of the local prefix of the second router is a random number.

The second router may configure the 62nd bit of the proxy prefix of the first router as a bit value of 1, and add one to the proxy prefix of the first router to obtain the proxy prefix of the second router. The proxy prefix of the second router may be represented as 2014:1010::000C/62, for example.

S511. The second router generates the IP address of the second terminal according to the local prefix of the second router.

The second router generates the IP address of the second terminal according to the local prefix of the second router and the state identifier allocated to the second terminal by the second router. If the status identifier of the second terminal is 2, the IP address of the second terminal may be represented as 2014:1010:0009::2.

S512 , the second router carries the local prefix of the second router in an RA message or an IA_NA message of DHCP and sends it to the third router.

S513. The third router generates the IP address of the WAN interface of the third router according to the local prefix of the second router.

The third router may generate the IP address of the WAN interface of the third router according to the local prefix of the second router and the state identifier of the third router. If the status identifier of the third router is 1, the IP address of the WAN interface of the third router may be represented as 2014:1010:0009::1.

The method for allocating an Internet Protocol address provided by the third embodiment of the present invention is described in detail by using a specific example to describe the method of any of the above embodiments, and the beneficial effects thereof are similar to those of the above embodiments, and are not repeated here.

Embodiment 4

The fourth embodiment of the present invention also provides a router. The router can execute the method for allocating an Internet Protocol address according to any one of the foregoing Embodiments 1 to 3. FIG. 6 is a schematic structural diagram of a router according to Embodiment 4 of the present invention. As shown in FIG. 6 , the router 600 may include: a receiving module 601 , a generating module 602 and a sending module 603 .

The receiving module 601 is configured to receive the proxy prefix of the upper-level network device sent by the upper-level network device; the upper-level network device is the network device connected to the WAN interface of the router.

The generating module 602 is configured to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device.

The sending module 603 is used for sending the local prefix of the router and the proxy prefix of the router to the subordinate router of the router; the subordinate router is the router connected to the LAN interface of the router; the local prefix of the router is used to make the subordinate router Determine the IP address of the WAN interface of the subordinate router; the proxy prefix of the router is used to make the subordinate router generate the local prefix of the subordinate router.

Optionally, the upper-level network device is a BAS or a router connected to the WAN interface of the router.

Optionally, the generating module 602 is further configured to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device if the router enables the cascade mode.

Optionally, the generating module 602 is further configured to configure the next bit of the lowest bit of the proxy prefix of the upper-level network device as the first bit value, and add a random value after the next bit to obtain the result. The local prefix of the router, so that the number of bits of the local prefix of the router is equal to the number of prefix bits of the EUI; the next bit is configured as the second bit value, and the number of bits of the proxy prefix of the upper-level network device is added. One, to obtain the proxy prefix of the router; wherein the first bit value is different from the second bit value.

Optionally, the number of bits of the proxy prefix of the upper-level network device is less than the number of bits of the prefix of the terminal unique identifier EUI.

The router provided in Embodiment 4 of the present invention can execute the Internet Protocol address allocation method in any of the foregoing Embodiments 1 to 3, and the beneficial effects thereof are similar to those of the foregoing embodiments, which will not be repeated here.

Embodiment 5

The fifth embodiment of the present invention also provides a router. FIG. 7 is a schematic structural diagram of a router according to Embodiment 5 of the present invention. As shown in FIG. 7 , the router 700 may include: a receiver 701, a processor 702 and a transmitter 703.

The receiver 701 is configured to receive the proxy prefix of the upper-level network device sent by the upper-level network device; the upper-level network device is the network device connected to the WAN interface of the router.

The processor 702 is configured to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device.

The transmitter 703 is used to send the local prefix of the router and the proxy prefix of the router to the subordinate router of the router; the subordinate router is the router connected to the LAN interface of the router; the local prefix of the router is used to make the subordinate router Determine the IP address of the WAN interface of the subordinate router; the proxy prefix of the router is used to make the subordinate router generate the local prefix of the subordinate router.

Optionally, the upper-level network device is a BAS or a router connected to the WAN interface of the router.

Optionally, the processor 702 is further configured to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device if the router enables the cascade mode.

Optionally, the processor 702 is further configured to configure the next bit of the lowest bit of the proxy prefix of the upper-level network device as the first bit value, and add a random value to the next bit to obtain the desired value. The local prefix of the router, so that the number of bits of the local prefix of the router is equal to the number of prefix bits of the EUI; the next bit is configured as the second bit value, and the number of bits of the proxy prefix of the upper-level network device is added. One, to get the proxy prefix for that router. Wherein, the first bit value is different from the second bit value.

Optionally, the number of bits of the proxy prefix of the upper-level network device is less than the number of bits of the prefix of the EUI.

The router provided in Embodiment 5 of the present invention can execute the Internet Protocol address allocation method in any of the foregoing Embodiments 1 to 3, and the beneficial effects thereof are similar to those of the foregoing embodiments, which will not be repeated here.

Embodiment 6

Embodiment 6 of the present invention further provides a computer-readable storage medium. FIG. 8 is a schematic structural diagram of a computer-readable storage medium according to Embodiment 6 of the present invention. As shown in FIG. 8 , the computer-readable medium 800 includes: at least one program 801 ; the at least one program includes computer-readable instructions 802 .

Computer-readable instructions 802, used to cause the processor of the router to call and execute, to receive the proxy prefix of the upper-level network device sent by the upper-level network device, and generate the local prefix of the router and the router according to the proxy prefix of the upper-level network device. The proxy prefix of the router, the local prefix of the router and the proxy prefix of the router are sent to the lower-level router of the router; wherein, the upper-level network device is the network device connected to the WAN interface of the router; the lower-level router is the LAN interface of the router The connected router; the local prefix of the router is used to enable the subordinate router to determine the IP address of the WAN interface of the subordinate router; the proxy prefix of the router is used to enable the subordinate router to generate the local prefix of the subordinate router.

Optionally, the upper-level network device is a BAS or a router connected to the WAN interface of the router.

Optionally, the computer-readable instructions 802 are further used to cause the processor of the router to call and execute when the router turns on the cascade mode, so as to generate the local prefix of the router and the proxy prefix of the upper-level network device according to the proxy prefix of the upper-level network device. The router's proxy prefix.

Optionally, the computer-readable instructions 802 are further used to cause the processor of the router to call and execute, to configure the next bit of the lowest bit of the proxy prefix of the upper-level network device as the first bit value, and A random value is added after the next bit to obtain the local prefix of the router, so that the number of bits of the local prefix of the router is equal to the number of prefix bits of the EUI, the next bit is configured as the second bit value, and the The number of bits of the proxy prefix of the upper-level network device is increased by one to obtain the proxy prefix of the router; wherein the first bit value is different from the second bit value.

Optionally, the number of bits of the proxy prefix of the upper-level network device is less than the number of bits of the prefix of the EUI.

The computer-readable storage medium provided in Embodiment 6 of the present invention may include at least one program of computer-readable instructions, which is used to cause the processor of the router to call and execute, thereby implementing any of the foregoing Embodiments 1 to 3. The beneficial effects of the method for allocating an Internet protocol address are similar to those of the above-mentioned embodiment, which will not be repeated here.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by program instructions related to hardware, the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (13)

1. an Internet Protocol address allocation method, is characterized in that, comprises: The router receives the proxy prefix of the upper-level network device sent by the upper-level network device; the upper-level network device is the network device connected to the WAN interface of the router; The router generates the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device; The router sends the local prefix of the router and the proxy prefix of the router to the subordinate router of the router; the subordinate router is the router connected to the local area network LAN interface of the router; the local prefix of the router is used for Make the lower-level router determine the Internet Protocol IP address of the WAN interface of the lower-level router; the proxy prefix of the router is used to make the lower-level router generate the local prefix of the lower-level router; The router generating the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device includes: The router configures the next bit of the lowest bit of the proxy prefix of the upper-level network device as the first bit value, and supplements the next bit with a random value to obtain the local prefix of the router, Make the number of bits of the local prefix of the router equal to the number of bits of the prefix of the terminal unique identifier EUI; The router configures the next bit as a second bit value, and adds one to the number of bits of the proxy prefix of the upper-level network device to obtain the proxy prefix of the router; wherein the first bit value different from the second bit value. 2 . The method according to claim 1 , wherein the upper-level network device is a broadband access server BAS or a router connected to a WAN interface of the router. 3 . 3. The method according to claim 1 or 2, wherein the router generates the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device, comprising: If the router enables the cascade mode, the router generates the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device. The method according to claim 3, wherein the number of bits of the proxy prefix of the upper-level network device is smaller than the number of bits of the prefix of the EUI. 5. A router, characterized in that, comprising: a receiving module, configured to receive the proxy prefix of the upper-level network device sent by the upper-level network device; the upper-level network device is a network device connected to the WAN interface of the router; a generating module, configured to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device; A sending module, configured to send the local prefix of the router and the proxy prefix of the router to a subordinate router of the router; the subordinate router is a router connected to the local area network LAN interface of the router; the local prefix of the router for enabling the subordinate router to determine the Internet Protocol IP address of the WAN interface of the subordinate router; the proxy prefix of the router is used for causing the subordinate router to generate the local prefix of the subordinate router; The generating module is further configured to configure the next bit of the lowest bit of the proxy prefix of the upper-level network device as the first bit value, and add a random value after the next bit to obtain the router the local prefix of the router, so that the number of bits of the local prefix of the router is equal to the number of bits of the prefix of the terminal unique identifier EUI; the next bit is configured as the second bit value, and the number of bits of the proxy prefix of the upper-level network device is The number of bits is increased by one to obtain the proxy prefix of the router; wherein the first bit value is different from the second bit value. 6 . The router according to claim 5 , wherein the upper-level network device is a broadband access server BAS or a router connected to a WAN interface of the router. 7 . 7. The router according to claim 5 or 6, characterized in that, The generating module is further configured to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device if the router enables the cascade mode. 8 . The router according to claim 7 , wherein the number of bits of the proxy prefix of the upper-level network device is less than the number of bits of the prefix of the terminal unique identifier EUI. 9 . 9. A router, comprising: a receiver, a processor and a transmitter; The receiver is configured to receive the proxy prefix of the upper-level network device sent by the upper-level network device; the upper-level network device is a network device connected to the WAN interface of the router; the processor, configured to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device; The transmitter is configured to send the local prefix of the router and the proxy prefix of the router to a subordinate router of the router; the subordinate router is a router connected to the local area network LAN interface of the router; The local prefix is used to enable the lower-level router to determine the Internet Protocol IP address of the WAN interface of the lower-level router; the proxy prefix of the router is used to enable the lower-level router to generate the local prefix of the lower-level router; The processor is further configured to configure the next bit of the lowest bit of the proxy prefix of the upper-level network device as the first bit value, and add a random value after the next bit to obtain the The local prefix of the router, so that the number of bits of the local prefix of the router is equal to the number of prefix bits of the terminal unique identifier EUI; the next bit is configured as the second bit value, and the proxy prefix of the upper-level network device One is added to the number of bits to obtain the proxy prefix of the router; wherein the first bit value is different from the second bit value. 10 . The router according to claim 9 , wherein the upper-level network device is a broadband access server BAS or a router connected to a WAN interface of the router. 11 . 11. The router according to claim 9 or 10, characterized in that, The processor is further configured to generate the local prefix of the router and the proxy prefix of the router according to the proxy prefix of the upper-level network device if the router enables the cascade mode. 12 . The router according to claim 11 , wherein the number of bits of the proxy prefix of the upper-level network device is smaller than the number of bits of the prefix of the EUI. 13 . 13. A computer-readable storage medium storing a computer program executable by a processor of a router to implement the Internet Protocol address assignment method of any one of claims 1-4.